| Acronym | Definition |
|---|
| OCCI | Oracle C++ Call Interface (computer programming) |
| OCCI | Oracle C++ Call Interface |
| OCCI | Open Cloud Computing Interface (network protocol) |
| OCCI | Oman Chamber of Commerce and Industry (Oman; est. 1973) |
| OCCI | Oregon Coast Culinary Institute (Coos Bay, OR) |
| OCCI | Osaka Chamber of Commerce and Industry (Osaka, Japan) |
| OCCI | Ocean and Climate Change Institute (Woods Hole Oceanographic Institution; Massachusetts) |
| OCCI | Olds College Centre for Innovation (agriculture; est. 1999; Alberta, Canada) |
| OCCI | Ontario Case Costing Initiative (Ontario, Canada) |
| OCCI | Oregon Center for Clinical Investigations, Inc |
| OCCI | Oakland Car Club International (Dearborn, MI) |